Chest x-ray is only every 12 months. But still somewhat understandable given the prevalence of TB in the country.
Basically it is what it is due to the low health outcomes of the general population which even among the pilot population still aren't as good as other jurisdictions. Especially when you factor in general sanitation, food handling standards, parasites, tropical diseases, palm oil etc.
Dental records are of course used to identify bodies when all else fails. Helpful to have up to the minute records.